Collapsible core.



C. CBOSSLEY.

GOLLAPSIBLE GORE.

APPLICATION FILED NOV. 12, 1907.

Patented May 10, 1910.

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6.0. UROSSLEY.

UOLLAPSIBLE GORE. APPLICATION FILED 11017.12, 1907.

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Patented May 10 INVENTOR U/zarZes 6. fi'asseg,

WITNESSES V- E N R 0 n A ANDREW H. GRAHAM c0 Puom-uwocnwnzna WASHINGTON, ma

IDE.

CHARLES C. CBOSSLEY, OF PORT CHESTER, NEW YORK.

COLLAPSIBLE GORE.

T 0 all whom it may concern:

Be it known that I, CHARLES C. CRossLnY, a citizen of the United States, residing at Port Chester, county of lVestc-hester, and State of New York, have invented a certain new and useful Improvement in Collapsible Cores, of which the following is a specification.

My invention relates to a new and useful improvement in expansion tubes or cores for constructing concrete or cement walls or building blocks, and has for its object to provide an exceedingly simple and effective device by the use of which the air spaces in concrete walls or building blocks may be readily formed and from which the tube may be readily withdrawn by first being contracted so as to avoid marring the space which it has formed.

lVith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may understand how to make and use the same I will describe its construction in detail, referring by letter to the accompanying drawing forming a part of this specification, in which Figure 1 is a vertical section, a portion of which is broken away to show that the tube may be of any desired length. Fig. 2, a section at the line XX of Fig. 1. Fig. 3, a vertical section taken at the line YY of Fig. 2. Fig. 4, plan view of the two halves of which the tube is composed. Fig. 5, is a broken away view of the top showing one of the elongated slots for the screws which hold the cap in place.

In carrying out my invention as here embodied, A represents the casing which is composed of the two sections a, each section having two webs B which run diagonally across the sections, one near the top and the other near the bottom, and each of these webs are flanged, and when the two sections are together these flanges overlap each other as clearly shown in Fig. 3 so as to hold the sections together. The sections of the casing when assembled overlap each other at their edges as clearly shown in Fig. 2, thus permitting a contracting movement diagonally, that is to say, when the sections are drawn toward each other their overlapping Specification of Letters Patent.

Application filed November 12, 1907.

Fatented May 1%, 1916.

Serial No. 401,808.

edges will cause them to move at an angle to the axis of the width of the casing, whereby the casing will be contracted in all directions so as to permit it to be withdrmvn from the space for which it was used as a core. To bring about this contraction of the sections of the casing I provide a. central shaft or red C which is provided with the incline front lug I) and rear lug I) at the upper and lower end thereof, and these lugs fit in the slots E formed in the webs so that when the rod is forced in one direction the sec tions of the casing will be expanded, and when forced in the opposite direction the sections will be contracted. The expansion of these sections is accomplished as follows hen the rod C is moved upward the lugs D and D being inclined toward their tops from side to side will cause the tube to expand from side to side, at the same time the incline surface D of the lugs D and incline surface D of lugs D will cause the tube to expand from end to end.

F represents the cap which is fitted over the sections and is held thereto by the screws G which pass through elongated slots in the cap so as to provide fOr'the movement necessary for the expansion and contraction of the sections, and in the center of this cap is fitted the operating screw H which is threaded into the rod C as clearly shown in Fig. 1, and this operating screw has formed therewith the handle. I by which it is revolved, and the revolving of this screw will raise or lower the rod C as the screw is turned in one direction or the other.

From the foregoing description it will be seen that my improved core when expanded may set in a mold and when the cement or concrete has been molded around the same and set the tube may be contracted as be fore described sinliciently to free it from the molded mass and permit its ready removal from the space thus formed. This is of great advantage in that when solid cores are used they adhere more or less to the mass molded around them and are often removed with great diiiiculty and in many cases with injury to the walls or blocks, but these disadvantages are entirely overcome by my improved core tube as above described.

Of course I do not wish to be limited to the exact details of construction here shown as these may be varied within certain i 'what I claim as new and useful, is-

1. In a device of the character described, two sections adapted to fit together so as to form an oblong core, webs carried by said sections, flanges formed upon said Webs, said flanges overlapping each other, a central rod, wedgeshaped lugs formed upon said rod, said lugs fitting within slots formed in the webs whereby the sections may be expanded or contracted, and an operating screw for bringing about the movements of the rod, as specified.

2. In a device of the character described, two sections adapted to fit together so as to form an oblong core, webs carried by said sections, flanges formed upon said webs, said flanges overlapping each other, a central rod,

wedge-shaped lugs formed upon said rod,

said lugs fitting within slots formed in the webs whereby the section may be expanded or contracted, an operating screw for bringing about the movements of the rod, and

a cap in which said operating screw is fitted to turn, as specified.

3. In a device of the character described, two sections adapted to fit together so as to form an oblong core, webs carried by said sections, flanges formed on said webs, said flanges overlapping each other, a central rod, wedge-shaped lugs formed upon said rod, said lugs fitting within slots formed in the webs whereby the sections may be expanded or contracted, an operating screw for bringing about the movements of the rod, a cap in which said operating screw is fitted to turn, and a handle secured to the operating screw for manipulating the same, as specified.

In testimony whereof, I have hereunto afiixed my signature in the presence of two subscribing witnesses.

CHARLES C. CROSSLEY.

Vitnesses:

TILSON F. lVAKErInLD, E. N. KNAPP. 

